Valve-abiwdeb



F. J. DERIFIELD.

VALVE GRINDER.

APPLICATION FILED APR. 26. I919.

' m/ VEN TOR f7 1% flewqfield ATTORNEYS FEBINANDO JOHN DERIFIELD, 0F BOISE, IDAHO.

VALVE-GRINDEB.

Specification of Letters Patent.

Patented Dec. 23, 1919.

Application filed April 26, 1919.. Serial No. 292,891.

To all whom it may concern:

Be it known that I, FERNANDO J. DERI- rmLo, a citizen of the United States, and a resident of Boise, in the county of Ada and State of Idaho, have invented certain new and useful Improvements in Valve-Grinders, of which the following is a specification.

This invention relates to an improvement in valve grinding devices and more particularly to an improved valve grinder adapted especially for use in grinding the valves with which the Buick automobiles are equipped.

The principal object of the invention is to provide a valve grinder which in opera tion will effect an oscillatory motion of the valves which are being ground and which, at the same time, will effect a continuous rotary motion of the valve cases or cages in one direction only, thus effecting an equal grinding of the surfaces at all points around the valve seat.

The further object of the invention is to provide an improved valve grinding machine which will be extremely simple, durable, and efficient in operation and inexpensive to manufacture.

With these and other objects in view, which will become apparent as the description proceeds, the invention resides in the construction, combination, and arrangement of parts-hereinafter more fully de scribed and claimed andillustrated in the accompanying drawing, in which like characters of reference indicate like parts throughout the several figures, of which- Figure 1 represents a side elevational view of the valve grinding machine constructed according to my invention; and

Fig. 2 represents a top lan View thereof.

Referring more particu arly to the drawing, a standard 2 is threaded at its lower end in a base plate 3. A frame 4: includes a sleeve portion 5 at its inner end, which slidably fits the standard 2, said frame being forked at its outer end to provide the upper and lower arms 6 and 7, respectively. A set screw 8, mounted in the sleeve of the frame, fixes the latter in adjusted position upon the standard.

A lJ-shaped bracket 9is mounted upon the inner end of the frame by means of a bolt or screw 10. This bracket carries a shaft 11, on which guide pulleys 12 are mounted, such pulleys serving to guide an endless belt 13, which is driven from a pulley 1 1 on a motor. The belt drives a double pulley 15, which is mounted on a vertical axis 16,

upon the: frame l. A double pulley is preferably used in case it is desired'to vary the speed at which the machine is driven without varying the speed of the motor, and this, of course, can be accomplished by shifting the belt from one pulley to the other.

A; vertical spindle 17 is mounted for rotation in the outer ends of the arms 6 of the frame. A similar spindle 18 is mounted ad j acent to the inner ends of these arms. The lower ends of the spindle are threaded and receive chucks 19. To the upper end of the spindle 1S and connected thereto at its central portion is a lever 20. A connecting bar or rod 21 is pivotally connected at its outer end at 22 to one end of the lever 20, the inner end of the connecting rod being pivoted off center to the pulley 15, as at 23. Anarm 24 is connected with the upper end of the spindle 17 in parallel relation with the lever 20, and a bar 25 connects the outer end of the lever 20 with the outer end of the arm24l for securing a simultaneous movement of the arm and lever. Suitable .bolts serve as the pivotal means between the various working parts of the machine. These bolts are readily removable for assembling the machine, so that the machine may be readily taken down for storage or shipment.

The belt 13 being driven in one direction will drive the pulley 15 in one direction, and this rotary motion of the pulley will be transmitted through the connecting bar 21 and the lever 20 and arm 2lto an oscillatory motion ofthe spindles 17 and 18, and the speed at which the spindles are driven will be determined by the speed of the driving motor, primarily. It will also be modified, as before stated, by the positioning of the driving belt in one or the other of the pulleys.

In operation, the valves removed from the cylinders, together with their cages, have their stems clamped in the chuck .19, as indicated in Fig. 1. The valves are then sus pended from the chucks in axial alinement withthe spindles, and the weight of the valve cases or cages come to bear upon the valve heads. The motor being started up will efiect, through the. arrangement already set out, a rapid oscillatory movement of the spindles. This will give an oscillatory mo tion to the valves and, at the same time, will permit the valve cases or cages to re ther, is of such nature that while the device is comparatively light, it is, at the same time, exceedingly strong and durable.

Although I have described the preferred embodiment of my invention, I may desire to make such changes, in the construction combination, and arrangement of parts thereof as do not depart from the spirit of the invention a'nd'scope of the appended claims.

' 1. A valve grinding machine including a standard, a frame mounted thereon, a pair of spindles rotatably mounted in parallel relation on said frame, and being provided at one end with means for fixing valve stems in axial alinement With the spindlesy a lever fixed to one of the spindles, an arm fixed to the other spindle, a bar connecting the lever and arm and pivoted to them, whereby to secure a slmultaneous movement of the lever and arm, a pulley mountedon' the frame, a connecting rod between the pulley and the lever for effecting an oscillatory 'movement of the lever when the pulley is driven, a drive belt extending around said pulley, and supporting means for the drive belt, substantially as described.

2. A valve grinding machine comprising a standard, a frame mounted thereon, a plurality of vertical spindles'journaled in said frame, means for oscillating said spindles in unison, and chucks carried by the lower ends of said spindles and adapted to grip valve stems and hold the same suspended with 'for holding valve stems, means connecting said spindles for effecting simultaneous movement thereof, and means for driving one of said spindles comprising a lever secured thereto, a driven pulley and a pitman connected eccentrically of said pulley and connected with said lever, a bracket secured -on said standard at the side opposite said frame, a horizontal shaft journaled in said bracket, a pair of guide pulleys on said shaft, and a drive belt trained over said guide pulleys and trained about said driven pulley.

l. A valve grinding machine comprising a' standard, a frame mounted thereon and extending laterally therefrom, a plurality of vertical parallel spindles journaled in said frame, means carried by said spindles for holding valve stems, means connecting said spindles for effecting simultaneous movement thereof, and means for driving one of said spindles con'iprising a lever secured thereto, a driven pulley and a pitman connected eccentrically of said pulley and connected with said lever, a bracket secured on said standard at the side opposite said frame, a horizontal shaft journalcd in said bracket, a pair of guide pulleys on said shaft, and a drive belt trained over said guide pulleys and trained about said driven pulley, said frame being adjustable longitudinally of said standard whereby to vary the tension on the drive belt.

FERNANDO JOHN DERIFIELD.

Witnesses ALTA F. KNAPP, JAMns H. RICHARDS. 

